scanf_s("%d", &input[i]); (qmc.cpp, line 352) when reading minterms reads those as decimal numbers, not as binary sequence. This causes issues in the same file, line 354: input[i] >= (0x01 << n) can be evaluated as false even when the inputs are correct - the right side is equal to 2^n, while the left side can exceed 10^n, if the first bit in minterm is 1.

I chose
bitset<26> b(to_string(input[i])); input[i] = b.to_ullong();
to convert decimal reading to binary, but I am not sure, if this is an optimal solution.